PDF files are generally created most likely for using on the web. Because of their special features these files have become trendy for distribution on the web as well as for giving high quality print output. Still, before using on the web, PDF files are to be optimized to get best results from them. When properly optimized these files can significantly compress their size and enhance their speedy display. Because of their demand on the web various software development companies have come forward and have introduced different software to compress PDF files.
Since there are diverse software to compress PDF files available in the market, all these software have a sole aim of giving exceptional results in compressing a PDF file. This software compresses the files by removing duplicate and unwanted PDF objects. They use Flate or RunLength compression algorithm. Some of this basic software is available for free while the professional ones offer special features which come at a price. PDF compression software gives generally 30 to 60% document compression.
The first step in getting good compression rate in a PDF file is by using JPEG compression, with this method color or grayscale images can be reduced by a factor of 10 or more. By adopting LZW or Flate compression a reduction of up to 50% can be achieved on a document containing text and images.
Various compression programs offer the flexibility of using the software, where a user can select the compression rate, quality, image size and options for color, grayscale and Monochrome images. Different software to compress PDF files can reduce the data in an image by using lossless and lossy compression, and there are different algorithms available to perform this task meticulously.